User-agent: SISTRIX Crawler
Disallow: /

User-agent: SISTRIX
Disallow: /

user-agent: AhrefsBot
Disallow: /

User-agent: Baiduspider
Disallow: /

User-agent: Yandex
Disallow: /

User-agent: netEstate NE Crawler
Disallow: /

User-agent: spbot
Disallow: /

User-agent: msnbot 
Crawl-delay: 1